CAT 584-7355 Bearing-Slv-Gd

CAT 584-7355 GD is a Caterpillar genuine GD series heavy-duty sleeve bearing, suitable for boom/rocker arm hinge pins, track frame balance shafts, and other components in Cat 966H/972H/980H loaders and D11T bulldozers. It features a steel-backed bronze alloy (CuSn10Pb10) straight-tube structure with graphite self-lubrication. Its core function is to support rotation/swing under heavy loads, reducing friction between the pin and the lug plate, protecting the lubrication channels, and providing stable radial load. The following is a professional technical and application guide:

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes
Model: 584-7355 GD, Type: GD series straight sleeve bearing (steel-backed bronze alloy + graphite lubrication, with axial lubrication grooves), Suitable for Cat 966H/972H/980H loader boom hinge pins, D11T bulldozer track frame balance shafts, 988H… The loader arm hinge pin is made of steel backing (SAE 1045, tensile strength ≥620 MPa) + CuSn10Pb10 bronze alloy layer (thickness 5 mm, HB 80-100) + 6 evenly distributed graphite lubrication points (φ3 mm, embedment depth 2 mm). The surface is uncoated (wear-resistant layer Ra≤0.8 μm). The inner diameter is φ160 mm (tolerance H7), the outer diameter is φ180 mm (tolerance h6), the length is 120 mm, the unit weight is approximately 18.5 kg, the rated radial load is ≥1000 kN, the operating temperature is -40℃ to +120℃, and the lubrication method is graphite self-lubrication + periodic grease lubrication (NLGI 2 lithium-based grease). The coefficient of friction is ≤0.12 (dry friction) / ≤0.08 (grease lubrication).

Key dimensions: Inner diameter cylindricity ≤0.03 mm, outer diameter cylindricity ≤0.04 mm. mm, parallelism of both end faces ≤0.05 mm, lubrication groove width 5 mm, depth 3 mm (axially distributed, 3 evenly distributed), steel back thickness 8 mm, bronze layer thickness tolerance ±0.1 mm, chamfer r=3 mm (tolerance ±0.3 mm), radial runout after installation ≤0.1 mm

Material and Process: Steel back is sandblasted and phosphated; bronze alloy layer is centrifugally cast with metallurgical bonding (bonding strength ≥220 MPa); graphite lubrication points are press-fitted; outer diameter is precision machined (Ra≤1.6 μm); inner diameter is precision bored (Ra≤0.8 μm); free from defects such as porosity and slag inclusions; salt spray resistance ≥200 hours

Compatible Models: Cat 966H/972H/980H loaders, D11T bulldozers, 988H loaders, 777D This mining truck suspension system is primarily designed for heavy-duty, dusty, and frequently swaying hinge joints. It reduces pin wear, ensures grease sealing, and is suitable for radial loads ≥800 kN.

Assembly Fit: Clearance fit with the pin (0.15-0.25 mm); interference fit with the hinge lug (0.12-0.20 mm, hydraulic press-fit). After installation, use a retaining ring for axial positioning. Press-in force ≤600 kN, press-in speed ≤5 mm/s, axial movement ≤0.2 mm.

Installation and Maintenance Points: Before installation, clean the bearing outer diameter, pin surface, and lug hole. Check the bearing for cracks, bronze layer peeling, and missing graphite spots. Ensure dimensions and tolerances meet requirements and the lubrication groove is unblocked.

During assembly, use a hydraulic press-fit machine to smoothly press the bearing into the lug hole. After pressing, check that the bearing end face is flush with the lug plane without misalignment. Install the retaining ring for fixation. Add lithium-based grease to the lug groove until overflowing.

Maintenance recommendations: Check wear and lubrication condition every 500 hours, add grease every 1000 hours, and replace immediately when the inner diameter wear is >0.3 mm or the bronze layer peels off to prevent abnormal wear of the pin and ear plate.